\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Error Structure Table table\label{I1\_cube}}
\begin{tabular}{l*{6}{c}}
\hline\hline
            &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}&\multicolumn{1}{c}{(6)}\\
            &\multicolumn{1}{c}{I1bin\_log\_csd}&\multicolumn{1}{c}{I1bin\_ihs\_csd}&\multicolumn{1}{c}{I1robust\_log\_csd}&\multicolumn{1}{c}{I1robust\_ihs\_csd}&\multicolumn{1}{c}{I1double\_log\_csd}&\multicolumn{1}{c}{I1double\_ihs\_csd}\\
\hline
1.bunch\_W1  &       0.956   &       0.998   &       0.956***&       0.998***&       0.956   &       0.998   \\
            &     (0.671)   &     (0.729)   &     (0.140)   &     (0.145)   &     (0.672)   &     (0.715)   \\
1.bunch\_W1#0bn.postban&           .   &           .   &           .   &           .   &           .   &           .   \\
            &           .   &           .   &           .   &           .   &           .   &           .   \\
1.bunch\_W1#1.postban&       2.290***&       2.425***&       2.290***&       2.425***&       2.290***&       2.425***\\
            &     (0.534)   &     (0.593)   &     (0.184)   &     (0.192)   &     (0.502)   &     (0.572)   \\
eei\_bin     &      -0.102   &      -0.152   &      -0.102***&      -0.152***&      -0.102   &      -0.152   \\
            &     (0.195)   &     (0.218)   &     (0.034)   &     (0.037)   &     (0.229)   &     (0.255)   \\
eei\_2       &       0.001   &       0.003   &       0.001   &       0.003** &       0.001   &       0.003   \\
            &     (0.007)   &     (0.007)   &     (0.001)   &     (0.001)   &     (0.008)   &     (0.009)   \\
eei\_3       &       0.000   &       0.000   &       0.000** &       0.000   &       0.000   &       0.000   \\
            &     (0.000)   &     (0.000)   &     (0.000)   &     (0.000)   &     (0.000)   &     (0.000)   \\
1bn.ccode   &      -1.238***&      -1.291***&      -1.238***&      -1.291***&      -1.238***&      -1.291***\\
            &     (0.123)   &     (0.129)   &     (0.067)   &     (0.073)   &     (0.112)   &     (0.131)   \\
2.ccode     &      -1.188***&      -1.243***&      -1.188***&      -1.243***&      -1.188***&      -1.243***\\
            &     (0.153)   &     (0.163)   &     (0.063)   &     (0.068)   &     (0.057)   &     (0.065)   \\
3.ccode     &           .   &           .   &           .   &           .   &           .   &           .   \\
            &           .   &           .   &           .   &           .   &           .   &           .   \\
4.ccode     &      -2.143***&      -2.275***&      -2.143***&      -2.275***&      -2.143***&      -2.275***\\
            &     (0.220)   &     (0.233)   &     (0.061)   &     (0.067)   &     (0.083)   &     (0.082)   \\
5.ccode     &      -1.623***&      -1.696***&      -1.623***&      -1.696***&      -1.623***&      -1.696***\\
            &     (0.174)   &     (0.183)   &     (0.061)   &     (0.066)   &     (0.054)   &     (0.058)   \\
6.ccode     &      -1.040***&      -1.109***&      -1.040***&      -1.109***&      -1.040***&      -1.109***\\
            &     (0.160)   &     (0.172)   &     (0.066)   &     (0.072)   &     (0.076)   &     (0.082)   \\
8.ccode     &      -2.220***&      -2.369***&      -2.220***&      -2.369***&      -2.220***&      -2.369***\\
            &     (0.218)   &     (0.231)   &     (0.063)   &     (0.069)   &     (0.065)   &     (0.067)   \\
\hline
r2          &       0.595   &       0.601   &       0.595   &       0.601   &       0.595   &       0.601   \\
N           &   15288.000   &   15288.000   &   15288.000   &   15288.000   &   15288.000   &   15288.000   \\
\hline\hline
\multicolumn{7}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{7}{l}{\footnotesize * \(p<0.10\), ** \(p<.05\), *** \(p<.01\)}\\
\end{tabular}
\end{table}
